Exercise tube



FIG. 1 is a front perspective view of the exercise tube.

FIG. 2 is a back perspective view of the exercise tube.

FIG. 3 is a front elevation view of the exercise tube.

FIG. 4 is a right side view of the exercise tube.

FIG. 5 is a left side view of the exercise tube.

FIG. 6 is a back elevation view of the exercise tube.

FIG. 7 is a top plan view of the exercise tube; and,

FIG. 8 is a bottom plan view of the exercise tube.

The broken line showing of FIGS. 1 and 4 are for illustrative purposesonly and form no part of the claimed design.

The ornamental design for the exercise tube, as shown and described.